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JELUTONG (Dyera costulata)

Trade Name

Jelutong

Scientific Name

Dyera costulata Hook. f.

Family

APOCYNACEAE

Common Names

Swamp jelutung; Lebuai; Jelutong-bukit; Djelutung; Hill Jelutong (United Kingdom); Hill Jelutong (United States of America); Pantung gunung (Indonesia); Melabuai (Indonesia); Jelutung bukit (Indonesia); Teen pet daeng (Thailand); Jelutong (Sabah); Jelutong bukit (France); Jelutong paya (France); Jelutong paya (United States of America); Jelutong (Spain); Jelutong paya (United Kingdom); Jelutong bukit (United States of America); Jelutong (Germany); Jelutong bukit (Netherlands); Jelutong bukit (United Kingdom); Jelutong (Italy); Andjaroetoeng (Sabah); Letoeng (Sabah); Pantoeng jelutong bukit (Sabah); Jelutong paya (Sabah); Jelutung (Indonesia); Jelutong (Malaysia); Melabuwai (Indonesia); Red and white jelutong (Singapore); Jelutong paya (Netherlands)

Description Of The Tree

Botanical Description

It is a large to very large tree, up to 65 m tall. The bole is branchless for up to 30 m, up to 250 cm in diameter, without buttresses.

Natural Habitat

Dyera costulata occurs in primary lowland or hill forests, in well drained locations, up to 300 m of altitude.

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Wood Identification

Anatomic Description Of Wood

Wood diffuse porous. Occasionally vestured pits. Vessels per mm2 5 to 20. Simple perforation plates. Vessel-ray pits similar to intervessel pits in size and shape. Intervessel pits small, 7 micras or less. Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. 3 to 4 cells per parenchyma strand. 4 to 10 rays per mm (medium). Body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal cells (Kribs-II). Fibers with distinctly bordered pits.

  • Wood Macro Photo Tangential Plane
  • Wood Micro Photo Of Transversal Section

Availability

Cites Status

Unrestricted

General Wood Description

Odor

It has no taste, but slight odor present.

Color

The sapwood has no distinct color, the heartwood is pale yellow, tends to darken on exposure.

COLOR INDEX (1=Black, 7=Light yellow,white)

7

Grain

The grain is usually straight.

Texture

The texture of the wood is fine.

Luster

It shows a lustrous surface if planed.

Natural Durability

It is perishable, highly prone to blue stain.

Natural durability index (1= Very high durability, 7=Vey low durability)

5

Resistance To Impregnation

Impregnation with preservative substances is reported to be good.

Wood Physical Properties

Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)

0.41

Air-dry Density (Weight and volume at 12%MC) (g/cm³)

0.44

Total shrinkage Tangential (Saturated to 0%MC) (%)

7.3

Total shrinkage Radial (Saturated to 0%MC) (%)

3.4

Recommended Dry Kiln Schedule

UK-H; US-T10-D4S

Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)

2.2

Wood Chemical Properties

Wood Mechanical Properties

Bending Strength (MOR),12%MC (kgf/cm²)

476

Stiffness (MOE) 12%MC (kgf/cm²)

77026

Compression parallel to fiber 12%MC (kgf/cm²)

263

Shear strength radial 12%MC (kgf/cm²)

57

Janka hardness (side) 12%MC (kgf)

126

Janka hardness (end grain) 12%MC (kgf)

128

Workability

Sawing

Sawing of this species is reported to be rather easy, but the saw-teeth may get clogged with latex.

Rotary Veneer Cutting

This species is reported to have good characteristics for lamination.

Sliced Veneer

This species is reported to have good characteristics for lamination.

Machining

Machining of this species is reported to be easy.

Planing

Planing operations are rather easy.

Moulding

Molding of this species is good to fair.

Turning

30

Boring

Boring of this species is fair.

Mortising

Mortising of this species is reported to be easy.

Nailing

This wood is easy to nail.

Gluing

Gluing behavior is reportedly good.

Sanding

It is easy to sand.

Finishing

Resin pockets can affect paint.

Staining

It is easy to stain.

Coatings

It paints and varnishes well.

Polishing

It has a good polishing.

Response To Hand Tools

The wood responds well to hand tools.

REFERENCED USES

End Uses Summary

FURNITURE AND CABINETS, PLYWOOD AND VENEER, cores, TURNING, cutlery, TOOLS, tool handles, PACKING, OTHER AND MUSICAL INSTRUMENTS, handicrafts, pencil, shoes, matches, moldings

Furniture Cabinets
  • 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Panels, Veneers
  • 25 - Directory of Timber Trade Malaysia
Cores
  • 27 - Embassy of Brazil in Japan
Turning
  • 30 - Embassy of Honduras in Japan
Knife Handles
  • 33 - Embassy of Gabon in Japan
Tools
  • 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Tool Handles
  • 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
Packing
  • 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Other & Musical Instruments
  • 63 - Madeiras do Brazil II
Handcraft
  • 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Pencils
  • 67 - Maderas latinoamericanas. VIII, Calophyllum brasilense, Couratari panamensis, Dendropanax arboreum y Bombacopsis sessilis
Shoes
  • 70 - Proprietes physiques et mecaniques des bois tropicaux de l`union francaise
Matches
  • 71 - Proprietes physiques et mecaniques des bois tropicaux, premier supplement
Molding
  • 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão

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